TOYO DENKI SEIZO KABUSHIKI KAISHA

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B08B CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 157
 
  
 
B61C LOCOMOTIVES; MOTOR RAILCARS 115
 
  
 
F16H GEARING199
 
  
 
H02K DYNAMO-ELECTRIC MACHINES 1106

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6891300 Rotor of induction starting synchronous motorAug 28, 03May 10, 05[H02K]
5522941 Underwater washing method and deviceJan 21, 94Jun 04, 96[B08B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5846337 Aerial washing method and apparatusExpiredJun 10, 96Dec 08, 98[B08B]
5077487 Driver circuit for a large capacity switching elementExpiredAug 30, 90Dec 31, 91[H03K]
5059887 Step-up and step-down chopper deviceExpiredAug 10, 90Oct 22, 91[G05F]
4745997 Offset detecting device for trolley-assisted vehiclesExpiredJul 22, 87May 24, 88[B60L]
4694125 Collector device for trolley-assisted vehiclesExpiredJul 17, 86Sep 15, 87[B60L]
4654679 Static induction thyristor with stepped-doping gate regionExpiredOct 01, 84Mar 31, 87[H01L]
4585910 Hook device for locking pantographExpiredDec 13, 83Apr 29, 86[B60L]
4528745 Method for the formation of buried gates of a semiconductor device utilizing etch and refill techniquesExpiredJul 06, 83Jul 16, 85[H01L]
4462070 DC-DC Converter provided with an AC linkExpiredJun 10, 82Jul 24, 84[H02D]
4423428 Pencil head for automatic drawing instrumentExpiredOct 27, 80Dec 27, 83[B43L, G01D]

Top Inventors for This Owner

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